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AMD RX-421BD vs AMD Ryzen 7 7840U
Last updated:
Benchmarks
Performance Overview
Average performance across multiple benchmarks
Single-core performance
Multi-core performance
iGPU - FP32 Performance (Single-precision GFLOPS)
AMD RX-421BD
20 %
AMD Radeon R7 - 512 (Merlin Falcon)
AMD Ryzen 7 7840U
100 %
AMD Radeon 780M
More benchmarks
Cinebench 2024 (SC)
427 entries
427 entries
Cinebench 2024 (MC)
422 entries
422 entries
Cinebench R23 (SC)
690 entries
690 entries
Cinebench R23 (MC)
665 entries
665 entries
Geekbench 6 (SC)
1,989 entries
1,989 entries
Geekbench 6 (MC)
1,927 entries
1,927 entries
Geekbench 5 (SC)
2,512 entries
2,512 entries
Geekbench 5 (MC)
2,483 entries
2,483 entries
FP32 SP (iGPU)
2,219 entries
2,219 entries
3DMark Timespy (iGPU)
534 entries
534 entries
PassMark CPU-Mark
2,504 entries
2,504 entries
CPU performance per watt (efficiency)
140 entries
140 entries
AI performance (NPU)
218 entries
218 entries
Specifications
At a glance
|
Wischen
|
AMD RX-421BD | AMD Ryzen 7 7840U |
|---|---|---|
| Family | AMD R (6) | AMD Ryzen 7 (79) |
| CPU group | AMD RX 1st Gen. (6) | AMD Ryzen 7040 (21) |
| Architecture | Merlin Falcon (Excavator) | Phoenix (Zen 4) |
| Technology | 28 nm | 4 nm |
| Segment | Notebook | Notebook |
| Socket | FP4 | FP8 |
| Predecessor | ||
| Successor | AMD Ryzen 7 8840U |
CPU Cores and Base Frequency
|
Wischen
|
AMD RX-421BD | AMD Ryzen 7 7840U |
|---|---|---|
| CPU Cores / Threads | 4 / 4 | 8 / 16 |
| Hyperthreading / SMT | ✗ | ✓ |
| Core architecture | normal | normal |
| Cores: | 4x | 8x Zen 4 |
| Frequency: | 2.10 GHz | 3.30 GHz |
| Turbo (1 Core): | 3.40 GHz | 5.10 GHz |
| Turbo (All Cores): | ||
| L2-Cache | 2.00 MB | 8.00 MB |
| L3-Cache | 16.00 MB | |
| Overclocking | ✗ | ✗ |
Integrated graphics (iGPU)
|
Wischen
|
AMD RX-421BD | AMD Ryzen 7 7840U |
|---|---|---|
| GPU name | AMD Radeon R7 - 512 (Merlin Falcon) | AMD Radeon 780M |
| GPU frequency | 0.80 GHz | 0.80 - 2.70 GHz |
| CUs / Shader | 8 / 512 | 12 / 768 |
| Raytracing | ✗ | ✓ |
| Max. displays | 3 | 4 |
| Max. GPU Memory | 2 GB | 32 GB |
| Technology | 28 | 4 nm |
| Release date | 2015 | Q1/2023 |
NPU AI performance
|
Wischen
|
AMD RX-421BD | AMD Ryzen 7 7840U |
|---|---|---|
| AI hardware | AMD Ryzen™ AI | |
| AI specifications | AMD dedicated AI XDNA Technology | |
| NPU + CPU + iGPU |
Memory & PCIe
|
Wischen
|
AMD RX-421BD | AMD Ryzen 7 7840U |
|---|---|---|
| Memory | DDR4-2400 (38.4 GB/s) DDR3-2133 (34.2 GB/s) | LPDDR5X-7500 (120.0 GB/s) LPDDR5-6400 (102.4 GB/s) DDR5-5600 (89.6 GB/s) DDR5-4800 (76.8 GB/s) |
| Max. Memory | 256 GB | |
| Memory channels | 2 | 2 |
| ECC | Yes | Yes |
| PCIe | 3.0 x 12 | 4.0 x 20 |
| PCIe Bandwidth | 11.8 GB/s | 39.4 GB/s |
Thermal Management
|
Wischen
|
AMD RX-421BD | AMD Ryzen 7 7840U |
|---|---|---|
| TDP | 35 W | 28 W |
| TDP (PL2) | ||
| TDP up | 30 W | |
| TDP down | 12 W | 15 W |
| T. junction max. | 90 °C | 100 °C |
Technical details
|
Wischen
|
AMD RX-421BD | AMD Ryzen 7 7840U |
|---|---|---|
| Chip design | Unknown | Monolithic |
| AES-NI | ✓ | ✓ |
| Operating systems | Windows 10, Windows 11, Linux | |
| Instruction set | x86-64 (64 bit) | x86-64 (64 bit) |
| ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX, FMA3, FMA4 | SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 |
| Release date | Q4/2015 | Q2/2023 |
| Release price | ||
| Documents | Technical data sheet |
User Reviews
Your rating
Here you can rate one or both of the processors. The average rating of AMD RX-421BD is 0 stars (0 ratings), while AMD Ryzen 7 7840U has received 4.7 stars (107 ratings).
Click on the stars to rate one or both processors.
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AMD Ryzen 7 7840U
8C / 16T · 5.10 GHz
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AMD RX-421BD
4C / 4T · 3.40 GHz
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